| skos:altLabel | - Big Boy
- Big Boys
- one of eight
- \"Big Boy\"
- 4-8-8-4 \"Big Boy\" steam locomotives
- 4000 class \"Big Boy\"
- 4884-1
- Big Boys\"
- UP Big Boy
- Union Pacific 4-8-8-4
- Union Pacific 4000 Class
- Union Pacific Big Boy 4004
- Union Pacific Big Boy 4005
- Union Pacific Big Boy#Preservation
- Union Pacific Big boy
- Union Pacific's ''Big Boy''
- \"Big Boy\" locomotive
- \"Big Boys\"
- eight that remain in existence
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